UNC, Cap Head Socket Screws, Allen Bolts, Self Colour.

UNC, Cap Head Socket Screws, Allen Bolts, Self Colour. 
 
Threads Per Inch:
2 - 56
4 - 40
5 - 40
6 - 32
8 - 32
10 - 24
1/4" - 20
5/16" - 18
3/8" - 16
7/16" - 14
1/2" - 13
9/16" - 12
5/8" - 11
3/4" - 10
7/8" - 9
1" - 8
1 1/8" - 7
1 1/4" - 7
1 1/2" - 6